Pet door



FIG. 1 is a top, front and left side perspective view of a pet door showing my new design;

FIG. 2 is a bottom, rear and right side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a top, front and left side perspective view showing the pet door in a disassembled state; and,

FIG. 10 is an enlarged view of portion 10 in FIG. 2 .

The broken lines in the drawings illustrate portions of the pet door which form no part of the claimed design. The dash-dot broken lines represent the bounds of the detail view and form no part of the claim. 

CLAIM The ornamental design for a pet door, as shown and described. 